include/sysemu/kvm.h

   1 /*
   2  * QEMU KVM support
   3  *
   4  * Copyright IBM, Corp. 2008
   5  *
   6  * Authors:
   7  *  Anthony Liguori   <aliguori@us.ibm.com>
   8  *
   9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
  10  * See the COPYING file in the top-level directory.
  11  *
  12  */
  13
  14 #ifndef QEMU_KVM_H
  15 #define QEMU_KVM_H
  16
  17 #include <errno.h>
  18 #include "config-host.h"
  19 #include "qemu/queue.h"
  20 #include "qom/cpu.h"
  21
  22 #ifdef CONFIG_KVM
  23 #include <linux/kvm.h>
  24 #include <linux/kvm_para.h>
  25 #endif
  26
  27 extern int kvm_allowed;
  28 extern bool kvm_kernel_irqchip;
  29 extern bool kvm_async_interrupts_allowed;
  30 extern bool kvm_irqfds_allowed;
  31 extern bool kvm_msi_via_irqfd_allowed;
  32 extern bool kvm_gsi_routing_allowed;
  33
  34 #if defined CONFIG_KVM || !defined NEED_CPU_H
  35 #define kvm_enabled()           (kvm_allowed)
  36 /**
  37  * kvm_irqchip_in_kernel:
  38  *
  39  * Returns: true if the user asked us to create an in-kernel
  40  * irqchip via the "kernel_irqchip=on" machine option.
  41  * What this actually means is architecture and machine model
  42  * specific: on PC, for instance, it means that the LAPIC,
  43  * IOAPIC and PIT are all in kernel. This function should never
  44  * be used from generic target-independent code: use one of the
  45  * following functions or some other specific check instead.
  46  */
  47 #define kvm_irqchip_in_kernel() (kvm_kernel_irqchip)
  48
  49 /**
  50  * kvm_async_interrupts_enabled:
  51  *
  52  * Returns: true if we can deliver interrupts to KVM
  53  * asynchronously (ie by ioctl from any thread at any time)
  54  * rather than having to do interrupt delivery synchronously
  55  * (where the vcpu must be stopped at a suitable point first).
  56  */
  57 #define kvm_async_interrupts_enabled() (kvm_async_interrupts_allowed)
  58
  59 /**
  60  * kvm_irqfds_enabled:
  61  *
  62  * Returns: true if we can use irqfds to inject interrupts into
  63  * a KVM CPU (ie the kernel supports irqfds and we are running
  64  * with a configuration where it is meaningful to use them).
  65  */
  66 #define kvm_irqfds_enabled() (kvm_irqfds_allowed)
  67
  68 /**
  69  * kvm_msi_via_irqfd_enabled:
  70  *
  71  * Returns: true if we can route a PCI MSI (Message Signaled Interrupt)
  72  * to a KVM CPU via an irqfd. This requires that the kernel supports
  73  * this and that we're running in a configuration that permits it.
  74  */
  75 #define kvm_msi_via_irqfd_enabled() (kvm_msi_via_irqfd_allowed)
  76
  77 /**
  78  * kvm_gsi_routing_enabled:
  79  *
  80  * Returns: true if GSI routing is enabled (ie the kernel supports
  81  * it and we're running in a configuration that permits it).
  82  */
  83 #define kvm_gsi_routing_enabled() (kvm_gsi_routing_allowed)
  84
  85 #else
  86 #define kvm_enabled()           (0)
  87 #define kvm_irqchip_in_kernel() (false)
  88 #define kvm_async_interrupts_enabled() (false)
  89 #define kvm_irqfds_enabled() (false)
  90 #define kvm_msi_via_irqfd_enabled() (false)
  91 #define kvm_gsi_routing_allowed() (false)
  92 #endif
  93
  94 struct kvm_run;
  95 struct kvm_lapic_state;
  96
  97 typedef struct KVMCapabilityInfo {
  98     const char *name;
  99     int value;
 100 } KVMCapabilityInfo;
 101
 102 #define KVM_CAP_INFO(CAP) { "KVM_CAP_" stringify(CAP), KVM_CAP_##CAP }
 103 #define KVM_CAP_LAST_INFO { NULL, 0 }
 104
 105 struct KVMState;
 106 typedef struct KVMState KVMState;
 107 extern KVMState *kvm_state;
 108
 109 /* external API */
 110
 111 int kvm_init(void);
 112
 113 int kvm_has_sync_mmu(void);
 114 int kvm_has_vcpu_events(void);
 115 int kvm_has_robust_singlestep(void);
 116 int kvm_has_debugregs(void);
 117 int kvm_has_xsave(void);
 118 int kvm_has_xcrs(void);
 119 int kvm_has_pit_state2(void);
 120 int kvm_has_many_ioeventfds(void);
 121 int kvm_has_gsi_routing(void);
 122 int kvm_has_intx_set_mask(void);
 123
 124 int kvm_init_vcpu(CPUState *cpu);
 125
 126 #ifdef NEED_CPU_H
 127 int kvm_cpu_exec(CPUArchState *env);
 128
 129 #if !defined(CONFIG_USER_ONLY)
 130 void *kvm_vmalloc(ram_addr_t size);
 131 void *kvm_arch_vmalloc(ram_addr_t size);
 132 void kvm_setup_guest_memory(void *start, size_t size);
 133
 134 void kvm_flush_coalesced_mmio_buffer(void);
 135 #endif
 136
 137 int kvm_insert_breakpoint(CPUArchState *current_env, target_ulong addr,
 138                           target_ulong len, int type);
 139 int kvm_remove_breakpoint(CPUArchState *current_env, target_ulong addr,
 140                           target_ulong len, int type);
 141 void kvm_remove_all_breakpoints(CPUArchState *current_env);
 142 int kvm_update_guest_debug(CPUArchState *env, unsigned long reinject_trap);
 143 #ifndef _WIN32
 144 int kvm_set_signal_mask(CPUArchState *env, const sigset_t *sigset);
 145 #endif
 146
 147 int kvm_on_sigbus_vcpu(CPUArchState *env, int code, void *addr);
 148 int kvm_on_sigbus(int code, void *addr);
 149
 150 /* internal API */
 151
 152 int kvm_ioctl(KVMState *s, int type, ...);
 153
 154 int kvm_vm_ioctl(KVMState *s, int type, ...);
 155
 156 int kvm_vcpu_ioctl(CPUState *cpu, int type, ...);
 157
 158 /* Arch specific hooks */
 159
 160 extern const KVMCapabilityInfo kvm_arch_required_capabilities[];
 161
 162 void kvm_arch_pre_run(CPUState *cpu, struct kvm_run *run);
 163 void kvm_arch_post_run(CPUState *cpu, struct kvm_run *run);
 164
 165 int kvm_arch_handle_exit(CPUState *cpu, struct kvm_run *run);
 166
 167 int kvm_arch_process_async_events(CPUState *cpu);
 168
 169 int kvm_arch_get_registers(CPUState *cpu);
 170
 171 /* state subset only touched by the VCPU itself during runtime */
 172 #define KVM_PUT_RUNTIME_STATE   1
 173 /* state subset modified during VCPU reset */
 174 #define KVM_PUT_RESET_STATE     2
 175 /* full state set, modified during initialization or on vmload */
 176 #define KVM_PUT_FULL_STATE      3
 177
 178 int kvm_arch_put_registers(CPUState *cpu, int level);
 179
 180 int kvm_arch_init(KVMState *s);
 181
 182 int kvm_arch_init_vcpu(CPUState *cpu);
 183
 184 void kvm_arch_reset_vcpu(CPUState *cpu);
 185
 186 int kvm_arch_on_sigbus_vcpu(CPUState *cpu, int code, void *addr);
 187 int kvm_arch_on_sigbus(int code, void *addr);
 188
 189 void kvm_arch_init_irq_routing(KVMState *s);
 190
 191 int kvm_set_irq(KVMState *s, int irq, int level);
 192 int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg);
 193
 194 void kvm_irqchip_add_irq_route(KVMState *s, int gsi, int irqchip, int pin);
 195
 196 void kvm_put_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
 197 void kvm_get_apic_state(DeviceState *d, struct kvm_lapic_state *kapic);
 198
 199 struct kvm_guest_debug;
 200 struct kvm_debug_exit_arch;
 201
 202 struct kvm_sw_breakpoint {
 203     target_ulong pc;
 204     target_ulong saved_insn;
 205     int use_count;
 206     QTAILQ_ENTRY(kvm_sw_breakpoint) entry;
 207 };
 208
 209 QTAILQ_HEAD(kvm_sw_breakpoint_head, kvm_sw_breakpoint);
 210
 211 struct kvm_sw_breakpoint *kvm_find_sw_breakpoint(CPUState *cpu,
 212                                                  target_ulong pc);
 213
 214 int kvm_sw_breakpoints_active(CPUState *cpu);
 215
 216 int kvm_arch_insert_sw_breakpoint(CPUState *current_cpu,
 217                                   struct kvm_sw_breakpoint *bp);
 218 int kvm_arch_remove_sw_breakpoint(CPUState *current_cpu,
 219                                   struct kvm_sw_breakpoint *bp);
 220 int kvm_arch_insert_hw_breakpoint(target_ulong addr,
 221                                   target_ulong len, int type);
 222 int kvm_arch_remove_hw_breakpoint(target_ulong addr,
 223                                   target_ulong len, int type);
 224 void kvm_arch_remove_all_hw_breakpoints(void);
 225
 226 void kvm_arch_update_guest_debug(CPUState *cpu, struct kvm_guest_debug *dbg);
 227
 228 bool kvm_arch_stop_on_emulation_error(CPUState *cpu);
 229
 230 int kvm_check_extension(KVMState *s, unsigned int extension);
 231
 232 uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function,
 233                                       uint32_t index, int reg);
 234 void kvm_cpu_synchronize_state(CPUArchState *env);
 235 void kvm_cpu_synchronize_post_reset(CPUArchState *env);
 236 void kvm_cpu_synchronize_post_init(CPUArchState *env);
 237
 238 /* generic hooks - to be moved/refactored once there are more users */
 239
 240 static inline void cpu_synchronize_state(CPUArchState *env)
 241 {
 242     if (kvm_enabled()) {
 243         kvm_cpu_synchronize_state(env);
 244     }
 245 }
 246
 247 static inline void cpu_synchronize_post_reset(CPUArchState *env)
 248 {
 249     if (kvm_enabled()) {
 250         kvm_cpu_synchronize_post_reset(env);
 251     }
 252 }
 253
 254 static inline void cpu_synchronize_post_init(CPUArchState *env)
 255 {
 256     if (kvm_enabled()) {
 257         kvm_cpu_synchronize_post_init(env);
 258     }
 259 }
 260
 261
 262 #if !defined(CONFIG_USER_ONLY)
 263 int kvm_physical_memory_addr_from_host(KVMState *s, void *ram_addr,
 264                                        hwaddr *phys_addr);
 265 #endif
 266
 267 #endif
 268 int kvm_set_ioeventfd_mmio(int fd, uint32_t adr, uint32_t val, bool assign,
 269                            uint32_t size);
 270
 271 int kvm_set_ioeventfd_pio_word(int fd, uint16_t adr, uint16_t val, bool assign);
 272
 273 int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg);
 274 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg);
 275 void kvm_irqchip_release_virq(KVMState *s, int virq);
 276
 277 int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n, int virq);
 278 int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq);
 279 void kvm_pc_gsi_handler(void *opaque, int n, int level);
 280 void kvm_pc_setup_irq_routing(bool pci_enabled);
 281 #endif